diff options
| author | archie <archie@FreeBSD.org> | 2003-04-23 18:35:40 +0000 |
|---|---|---|
| committer | archie <archie@FreeBSD.org> | 2003-04-23 18:35:40 +0000 |
| commit | 84db389df40a359de80dfdd74c35a81241433aea (patch) | |
| tree | 1aadef638e961d7a0d94967f0be79c16e72d8aa5 /sys/net/if_ethersubr.c | |
| parent | 485007051ab7027550f5cf7b6684707536004dcc (diff) | |
| download | FreeBSD-src-84db389df40a359de80dfdd74c35a81241433aea.zip FreeBSD-src-84db389df40a359de80dfdd74c35a81241433aea.tar.gz | |
Fix a case where the return value from m_copy() was not being checked
for NULL before proceeding, causing a crash if mbufs were exhausted.
MFC after: 3 days
Reported by: Mark Gooderum <mark@verniernetworks.com>
Diffstat (limited to 'sys/net/if_ethersubr.c')
| -rw-r--r-- | sys/net/if_ethersubr.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c index 8dfb5fb..bb2bbd6 100644 --- a/sys/net/if_ethersubr.c +++ b/sys/net/if_ethersubr.c @@ -281,13 +281,13 @@ ether_output(ifp, m, dst, rt0) if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { struct mbuf *n; - n = m_copy(m, 0, (int)M_COPYALL); - n->m_pkthdr.csum_flags |= csum_flags; - if (csum_flags & CSUM_DATA_VALID) - n->m_pkthdr.csum_data = 0xffff; - - (void) if_simloop(ifp, n, dst->sa_family, hlen); + if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { + n->m_pkthdr.csum_flags |= csum_flags; + if (csum_flags & CSUM_DATA_VALID) + n->m_pkthdr.csum_data = 0xffff; + (void)if_simloop(ifp, n, dst->sa_family, hlen); + } } else if (bcmp(eh->ether_dhost, eh->ether_shost, ETHER_ADDR_LEN) == 0) { m->m_pkthdr.csum_flags |= csum_flags; |
